Power Solutions for Appliance Controls

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Power Solutions for Appliance Controls

• February 2006

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Power Supply Solutions Offline
VIPer
Vertical Intelligent Power Enhanced Regulator
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VIPerX2A Offline SMPS Primary IC

• Very low cost solution compared to discrete
• PWM Driver Current Mode Control
• 60kHz Fixed Switching Frequency
• On-chip Protection
• Over Voltage
• Over Current
• Over Temperature
• Integrated Start-up Supply
• Device Extended Voltage Range 9-36V
• Stand-by condition able to meet BLUE ANGEL Norm
  with Automatic Burst Mode Operation

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VIPerX2A Offline SMPS Primary IC
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VIPer for Home Appliance Applications
Solution Example 16V, 100/300mA Off-Line Power
Supply

• Home Appliance Specification (sample)
• 15V for gate drivers
• /-5 for microcontroller and LEDs
• 24V or 12V for relays (optional)
• Standby Consumption lt 100mW (no load)
• Total SMPS cost lt 1 USD

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VIPer for Home Appliance Applications
Solution Example Auxiliary Power Supply for Oven
/ Range

• Oven / Range Specification (sample)
• Vout1 -9V/300mA (/-5) drives the LED display
  and linear regulator to supply
• -5V for the microcontroller
• Vout2 -18V /10mA (/-10) to drive relays

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VIPer in Home Appliance Applications
Application Example BLDC Compressor Control for
Inverter Refrigerator

• Project Benefits
• Efficiency maximization
• Cost
• Kit leverage (MCUDriverIGBTViper)

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VIPer Design Software

• Supports Multiple Outputs
• Effective Transformer Design
• Online Calculation
• Graphic Outputs
• Available at www.st.com/viper

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Power Supply Solutions DC/DC
Switching and Linear Products
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Overview of Switching Families

• L597XD Step-Down Switching Regulator
• Up to 2A in SO-8 package, with minimum external
  component count
• Wide input voltage range (4V to 36V) to fit most
  applications
• High switching frequency (250KHz/500kHz
  synchronizable up to 700kHz) to minimize
  application size

• Smallest Package
• Compact Solution
• Embedded Functions

• Different Packages
• Higher Programmability
• Increased Current Capability

• L497X Step-Down Switching Regulator
• Up to 10A available both in SMD and DIP packages
• Vin range 8V to 55V
• Programmable switching frequency up to 300kHz

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L497X Series
Features

• 1A - 10A peak current
• Programmable switching frequency up to 300KHz
• Internal current limiting
• Inhibit for zero current consumption
• Thermal Shutdown
• OVP ()
• External reference ()

() all but L4976 () L4976 and L4973
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L597X Series
Features

• 1A 2.5A peak current
• Programmable switching frequency up to 300KHz
• Internal current limiting
• Inhibit for zero current consumption
• Thermal Shutdown

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Step-Down Switching Regulators
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Linear Regulators

• Low-Drop 114
• Very Low-Drop 255
• Standard Positive 117
• Standard Negative 27
• Multifunction / Application Specific 56
• RAD-HARD Standard Positive 4

573 Part Numbers for Linear Regulators
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Special ULDO Linear Regulators

• L6932Dx.x
• Current up to 2A
• Vin 2V-14V
• SO8(44) Rthj-amb 62C/W

L4957AVx.x

• L4957Ax
• Current up to 5A
• Vin 3V-14V
• TO220 or D2PACK

L4957ADx.x
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Triacs, Thyristors, and Protection Devices
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Triacs

• Standard and Snubberless Triacs
• 600V 800V Peak Repeat Reverse Voltage
• 600V 800V Peak Repeat Forward Voltage
• 0.8A 40A (RMS On-state Current)
• 5mA 50mA Gate Trigger Current
• Up to 500V/us Minimum dV/dt
• 125C Junction Temperature

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High-Temperature Triacs

• Snubberless High-Temperature Triacs
• Junction Temperature 150C
• 600V Peak Repeat Reverse Voltage
• 600V Peak Repeat Forward Voltage
• 12A, 15A (RMS On-state Current)
• 35mA, 50mA Gate Trigger Current

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High-Temperature Triacs

• Specifically designed for Hot applications such
  as
• Electric ovens
• Halogen cookers
• Coffee Equipment
• Cooktops....
• Specified at 150C to withstand high temperature
  environment
• Very low Rth(j-c) lt 1C/W for optimized heatsink
  dimensioning
• Tested under high temperature reliability
  conditions
• 10 years of operation, simulated

T2550H-600T
T1235H-600G
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ACS Family
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WHY ACS ?
The Switch for Actuators
Auto-protected structure
Driven directly from the Microcontroller
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ACS Switching Benefits

• No more external MOV
• ACS Protected structure
• Snubber Circuit Eliminated
• Due to high dV/dt
• Resist Line Transient
• Compliant with IEC61000-4-5 standard
• Simplified Gate drive
• No buffer interface needed
• Suppression of "kick-back" effect

ACS
ACS
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ACS Benefits
YESTERDAYS WINNING CHOICE
TODAYS WINNING SOLUTION
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ACS Off State Robustness
The ACS or ACST withstands successfully voltage
surges up to 2 kV
Breaks over safely even on low inductance
load and enables equipment to meet IEC61000-4-5
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ACS Turn-Off On Inductive Load Valve
Very inductive and low power load (10 to 15H )
At turn-off, the AC component cut off a very
inductive current.
Overvoltage at turn-off
Over-voltage is clamped and inductive energy
absorbed in the structure ( Transil behaviour )
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High Noise Immunity Comparison to Standard Triac

• Can get rid of RC filter to pass IEC61000-4-4
  noise immunity standard
• Can use sensitive switch (5mA or 10mA gate
  drive) directly driven by MCU output (no need of
  buffer transistor)

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AC Switch Range Extension
Voltage (V)
1,200
1,100
ACS110
ACS120
ACST8
1,000
Dishwasher
Air cond.
Washer
ACS302
900
Washer
800
700
ACS402
ACST6
600
Washer
Fridge
500
ACST4
ACS102
ACS108
400
Dishwasher
Washer
Washer
300
200
100
0.1
1
10
20
Current (A)
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ACS Centralized Load Control Dishwasher,
Laundry

Quad switch ACS402
For centralized compact power section
4 x 0.2A, 500 V AC Switch in DIL20
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ACS Mapping Washer Dishwasher
EMC
Drum Speed Control
Drain Pump
Water Heater
Water Valve
Door Lock
Dispenser
Direct Drive
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ACS Mapping Cold Appliances
Compressor
Lamp
Defrost heater
EMC
Defrost fan
Direct Drive
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ACS Mapping Hot Appliances
Halogen hob
Lamp
Cooking fan
Doorlock
Turn table
Cooling fan
Transil Diode
ACS120
ACS108
ACS120
ACS120
ACS108
T2550H
MICROCONTROLLER
T sensor
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ACS Layout Possibilities with SMD Package

• The SMD tab is the drive reference voltage
• Common heatsink areas for all ACSs
• The heatsink can be used as a power supply bus

Triac pin-out
ACS pin-out
A2
Com
Out
A1
Com
A2
G
G
PCB required for Triacs
PCB required for ACS
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ACS / ACST Off State Robustness
VRRM -VDRM gt symmetrical component
regarding leakage current. Positive Negative
VCL typical value only.
No more operating voltage prohibited area
Example ACST6
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ACS OFF STATE ROBUSTNESS IEC 61000-4-5 test

Turn-on by overvoltage

• Line to Neutral test
• Surge up to 2kV
• Temporary mis-operation is accepted
• No failure

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ACS Off State Robustness
Disconnection recovery after surge
Vout 500V/div
Vpeak 1300 V
Iout 5 A/div
Conduction lt 10 ms ( 50Hz configuration)
Ipeak 19 A
Time 2 ms/div
ACST RECOVERS BLOCKING POWER WITHIN HALF LINE
CYCLE
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ACS Benefits Summary

• Obviates external protection snubber varistor
• Enables the equipment to meet IEC61000-4-5
  standard
• Eliminates any gate kick back on the
  microcontroller
• Direct digital drive (D.D.D system) with the
  microcontroller
• Reduces the switch component count by up to 80
• ACS array Miniaturizes n switches in 1 package
  (ACS402 ACS302)
• SMDs Straightforward connection on same pad